3Com V7111 - VCX 4 Channels Analog FXO Media Gateway User Manual page 132

VCX V7111 FXO Functionality
FXO Capabilities
(does not apply to the
2FXS)
Voice and Tone Characteristics
Voice Compression
Silence Suppression
Echo Canceler
Gain Control
DTMF Transport
DTMF Detection and
Generation
Call Progress Tone
Detection and
Generation
Output Gain Control
Input Gain Control
Fax/Modem Relay
Fax Relay
Modem Relay
132
Short or Long Haul up to 7,000 m (24,000 ft) using 24 AWG line cord.
Includes lightning and high voltage protection for outdoor operation.
Programmable Line Characteristics: AC impedance matching, hybrid
balance, Tx and Rx frequency response, Tx and Rx Gains, ring detection
threshold, DC characteristics.
Caller ID detection: Bellcore GR-30-CORE Type 1 using Bell 202 FSK
modulation or ETSI Type 1 (between first and second rings).
G.711 PCM at 64 Kbps µ-law/A-law
G.723.1 MP-MLQ at 5.3 or 6.3 Kbps
G.726 at 16 – 40 Kbps ADPCM and E-ADPCM G.729A CS-ACELP at 8 Kbps
NetCoder at 6.4 – 8.8 Kbps, 800-bit increments (proprietary coder)
G.723.1 Annex A
G.729 Annex B
PCM and ADPCM - Proprietary Voice Activity Detection (VAD) and Comfort
Noise Generation (CNG)
NetCoder
G.168, 25 ms
Programmable
Mute, transfer in RTP payload or relay in compliance with RFC 2833
Dynamic range 0 to –25 dBm, compliant with TIA 464B and Bellcore TR-
NWT-000506.
15 tones: single tone or dual tones, programmable frequency and amplitude;
16 frequencies in the range 300 –2000 Hz, 1 or 2 cadences per tone, up to
two sets of ON/OFF periods.
-31 dB to +31 dB in steps of 1 dB
-31 dB to +31 dB in steps of 1 dB
Group 3 fax relay up to 14.4 Kbps with auto fallback
T.38 compliant, real time fax relay
Tolerant network delay (up to 9 seconds round trip)
Up to 14.4 Kbps V.32bis (optional)
3Com VCX V7111 VoIP SIP Gateways User Manual